If it has a 7201 engine it has 110mm stroke, if it is a 7202 engine (TIER 1) it has 120mm stroke like the 7701 engine.
I have no idea if they changed the block to allow the crankshaft to make a bigger circle. I think the 120mm stroke blocks are different because they have ribs on the outside.
You can get 375hp from one of these, like Andreas Lehmann the winner of the Swiss tractorpulling 2.5 ton supersport class. His tractor is disguised as a Proxima but it has a UR1 engine.